<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr />
    <textarea placeholder="请输入评论内容(最多50字)" maxlength="50" v-model="msg"></textarea>
    <mt-button type="primary" size="large" v-on:click="postComment">发表评论</mt-button>

    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="i">
        <div
          class="cmt-title"
        >第{{ i+1 }}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time|dateFormat }}</div>
        <div class="cmt-body">{{ item.content === 'undefined' ? '此用户很懒，啥都没说' : item.content }}</div>
      </div>
    </div>

    <mt-button size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>
<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageIndex: 1,
      comments: [],
      msg: ""
    };
  },
  created() {
    this.getComment();
  },
  methods: {
    // 获取评论
    getComment() {
      this.$http // api/getcomments/:id?pageindex=1
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(result => {
          if (result.body.status === 0) {
            // this.comments = result.body.message;
            this.comments = this.comments.concat(result.body.message);
          } else {
            Toast("评论加载失败");
          }
        });
    },
    // 加载更多评论
    getMore() {
      this.pageIndex++;
      this.getComment();
    },
    // 发表评论
    postComment() {
      if (this.msg.trim().length === 0) {
        return Toast("评论不能为空！");
      }
      this.$http
        .post("api/postcomment/" + this.id, { content: this.msg.trim() })
        .then(function(result) {
          if (result.body.status === 0) {
            var cmt = {
              user_name: "匿名用户",
              add_time: Date.now(),
              content: this.msg.trim()
            };
            this.comments.unshift(cmt);
            this.msg = "";
          }
        });
    }
  },
  props: ["id"]
};
</script>

<style lang="scss">
.cmt-container {
  margin-top: 16px;
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    margin: 0;
    height: 80px;
  }
  button {
    margin-top: 5px;
  }
  .cmt-list {
    margin-top: 8px;
    .cmt-item {
      .cmt-title {
        background-color: #cccccc;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>